Library of Congress

Authorities & Vocabularies

The Library of Congress > Linked Data Service

Preservation Datasets

The Linked Data Service is to provide access to commonly found standards and vocabularies promulgated by the Library of Congress. This includes data values and the controlled vocabularies that house them. Below are descriptions of each preservation vocabulary derived from the PREMISOffsite link standard. Inside each, a search box allows you to search the vocabularies individually .

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Preservation Vocabs (all)

An umbrella scheme to collocate all the preservation vocabularies.

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Actions Granted

The action the preservation repository is allowed to take.

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Agent Type

A high-level characterization of the type of agent.

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Content Location Type

Information about how and where a file is stored in the storage system

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Copyright Status

A coded designation for the copyright status of the object at the time the rights statement is recorded.

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Cryptographic Hash Functions

A cryptographic hash function is a transformation that takes an input and returns a fixed-size string, which is called the hash value. Hash functions with this property are used for a variety of computational purposes, including cryptography. The hash value is a concise representation of the message or document from which it was computed. Cryptographic hash functions are used to do message integrity checks and digital signatures in various information security applications, such as authentication and message integrity. They may also be referred to as message digest algorithms or checksum algorithms.

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Environment Characteristic

Hardware/software combinations supporting use of the object.

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Environment Purpose

The use(s) supported by the specified environment.

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Event Related Agent Role

The role of the agent in relation to the described event.

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Event Related Object Role

The role of the object associated with an event.

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Event Type

Event types are actions performed on digital objects within a preservation repository.

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Format Registry Role

The purpose or expected use of the registry.

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Hardware Type

Class or category of the hardware.

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Inhibitor Target

The content or function protected by the inhibitor.

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Inhibitor Type

The inhibitor method employed.

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Object Category

The category of object to which the metadata applies.

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Preservation Level Role

The context in which a set of preservation options is applicable.

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Relationship SubType

A specific characterization of the nature of the relationship.

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Relationship Type

A high level categorization of the nature of the relationship between this object and one or more other objects.

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Rights Basis

Designation of the basis for the right or permission.

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Rights Related Agent Role

The role of the agent in relation to the Rights Statement.

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Signature Encoding

The type of encoding used in a digital signature.

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Signature Method

A designation of the encryption and hash algorithms used for signature generation.

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Software Type

The class or category of software required to render or use the object.

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Storage Medium

The physical medium on which the object is stored.

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